Study On Anti-crease Finishing Performance Of Cotton Fabric With Glyoxal And Modified Starch

As a kind of long-history and widely-used natural fiber, cotton fiber has much public favor for its nice hygroscopicity and heat retention property, taking comfort and soft hand feeling. It also has many shortcomings in daily life, such as bad crease recovery. So the anti-crease finishing for cotton fabric is essential. As a kind of promising formaldehyde-free anti-crease finishing agent, glyoxal is cheap and easy to get. The finishing process is simple and cotton fabric can get well anti-crease performance after finishing. But it is found that there are still two problems in the process of finishing with glyoxal. One is the poor wet crease recovery of the fabric, and the other is the serious loss of fabric strength. These two problems limit its wide application.Starch is very common in the nature and indispensable in our daily life. The molecular weight of nature starch is very big. After modifying, the molecular weight decreases and modified starch has an extensive use in industry. To improve the strength and wet crease recovery of the fabric, this topic envisages to increase the molecular weight and reactivity of cross-linking agent by compounding modified starch and glyoxal.The first phase of the experiment is mainly to explore the influence of anti-crease performance on fabric with different modified processes. The results show that starch modified at 90℃ for 30 minutes with 15% hydrochloric acid play a larger role in anti-crease finishing. The dry crease recovery angle of fabric improved slightly and the strength retention improved 10% comparing with finishing by glyoxal alone. But the wet crease recovery angle of fabric does not improve effectively. Therefore, we decide to use a more efficient catalyst in the second phase of the experiment. We study the effects of curing temperature and time on fabric anti-crease performance mainly this stage. The results show that the dry resilience of fabric is comparable with the first stage. The wet resilience of fabric improved slightly and the strength retention improved 12%, which is a great progress. The finishing effects under two kinds of catalysts both have well washing resistance after testing. The only downside is that the wet resilience of fabric is still not ideal.